PRO Sealed Cartridge Headset Top Assembly

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Building up a new ride or replacing a tired, worn-out top assembly?

PRO has you covered with their Sealed Cartridge headsets. These upper assemblies are the perfect combination of value and quality. With durable and replaceable cartridge bearings, you'll be covered for seasons of use.

Please note: If you're unsure of the correct size, check your owner's manual or view our blog to learn how to identify the correct headset.​


  • Double sealed cartridge bearing
  • Anodised alloy cups
  • Gap cap included
  • High quality steel bearings


IS42/28.6: For frames with 42mm inner top diameter. Tapered or 1 1/8" steerer tubes.

  • IS – Integrated or Drop Fit
  • IS42/28.6

EC34/28.6: 34mm inner top diameter. Tapered or 1 1/8" steerer tubes.

  • EC - External Cup
  • EC34/28.6

IS41/28.8: For frames with 41mm inner top diameter. Tapered or 1 1/8" steerer tubes.

  • IS – Integrated or Drop Fit
  • IS41/28.8

ZS44/28.6: For frames with 44mm inner top diameter. Tapered or 1 1/8" steerer tubes.

  • ZS – Zero Stack / Semi-Integrated / Internal
  • ZS44/28.6

To determine which headset you need, Click here.

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Ships from our Melbourne, Australia Warehouse



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